Elektra/Asylum/Nonesuch Records (not for release label use! a division of Warner Communications Inc.)

evidence that Elektra/Asylum/Nonesuch Records had already existed prior to 1977: https://www.discogs.com/release/2864502-Bob-Neuwirth/images ("Mfg by Elektra/Asylum/Nonesuch Records" printed on vinyl label in a 1974 LP)

offices at:
9229 Sunset Blvd., Los Angeles, CA 90069 / 665 5th Avenue, New York, NY 10022

please note that Elektra/Asylum Records and Elektra/Asylum/Nonesuch Records were two separate companies, formed in August 1973 when the Elektra and Asylum Records labels were merged. For release labels, please check your release for the correct imprints to use, namely:
Elektra | Asylum | Nonesuch | Elektra Nonesuch